NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 503
ONVOY, LLC - OR 4
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 1
BANDWIDTH.COM CLEC, LLC - OR 1
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2005-11-17 503-549-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
2005-11-17 503-549-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BEAVERTON OR
2005-11-15 503-593-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-11-15 503-593-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-11-15 503-593-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-11-04 503-929-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-04 503-929-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-11-03 503-545-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-28 503-764-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-10-28 503-764-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-10-28 503-764-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-10-26 503-545-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-10-26 503-545-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2005-10-24 503-841-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-24 503-841-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-24 503-841-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-24 503-841-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-24 503-841-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-24 503-857-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MCMINNVL OR
2005-10-19 503-951-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOODBURN OR
2005-10-13 503-764-0XXX 0000–0999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 PORTLAND OR
2005-10-11 503-336-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 BEAVERTON OR
2005-10-11 503-336-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 BEAVERTON OR
2005-10-11 503-336-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 BEAVERTON OR
2005-10-11 503-906-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7172 BEAVERTON OR
2005-10-10 503-396-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 ST HELENS OR
2005-10-10 503-602-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2005-10-06 503-545-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2005-10-04 503-621-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-10-04 503-820-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-10-04 503-922-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PORTLAND OR
2005-09-26 503-487-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 NEWBERG OR
2005-09-26 503-487-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OR 3234 NEWBERG OR
2005-09-23 503-545-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-23 503-545-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-23 503-545-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-23 503-545-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-23 503-545-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-23 503-545-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-15 503-487-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 NEWBERG OR
2005-09-15 503-758-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2005-09-15 503-758-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.